<ARTICLE>           5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THERMO
TERRATECH INC.'S ANNUAL REPORT ON FORM 10-K FOR THE PERIOD ENDED APRIL 3, 1999
AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER>        1,000

                              
<PERIOD-TYPE>                                 YEAR
<FISCAL-YEAR-END>                             APR-03-1999
<PERIOD-END>                                  APR-03-1999
<CASH>                                                 43,013
<SECURITIES>                                                0
<RECEIVABLES>                                          62,954
<ALLOWANCES>                                            3,577
<INVENTORY>                                             1,869
<CURRENT-ASSETS>                                      134,375
<PP&E>                                                151,219
<DEPRECIATION>                                         59,705
<TOTAL-ASSETS>                                        350,465
<CURRENT-LIABILITIES>                                  67,332
<BONDS>                                               153,922
<PREFERRED-MANDATORY>                                       0
<PREFERRED>                                                 0
<COMMON>                                                1,958
<OTHER-SE>                                             90,199
<TOTAL-LIABILITY-AND-EQUITY>                           92,157
<SALES>                                                     0
<TOTAL-REVENUES>                                      310,039
<CGS>                                                       0
<TOTAL-COSTS>                                         247,610
<OTHER-EXPENSES>                                       10,217
<LOSS-PROVISION>                                        2,085
<INTEREST-EXPENSE>                                      8,981
<INCOME-PRETAX>                                          (808)
<INCOME-TAX>                                            1,786
<INCOME-CONTINUING>                                    (1,421)
<DISCONTINUED>                                              0
<EXTRAORDINARY>                                             0
<CHANGES>                                                   0
<NET-INCOME>                                           (1,421)
<EPS-BASIC>                                           (0.07)
<EPS-DILUTED>                                           (0.07)